Decreasing Coalbed Methane Formation Damage Using Microfoamed Drilling Fluid Stabilized by Silica Nanoparticles

Table 3

Basic properties of microfoamed drilling fluid containing NPs.

Drilling fluid type	(g/cm^3)	AV (mPa⋅s)	PV (mPa⋅s)	YP (Pa)	Gel (Pa/Pa)	FL (mL)
LV-CFMDF-NP	0.885	19.5	15	4.5	0.4/0.5	—
HV-CFMDF-NP	0.872	37.5	20.5	17	2.5/2.75	—

Note: : density, AV: apparent viscosity, PV: plastic viscosity, YP: yield point, Gel: gel strength, and FL: API fluid loss.